No official changelog available. According to maintainer, the major changes for this release are optimizations:

-Moved several global variables to local
-Fewer Malloc calls
-Several stack optimizations
-More compiler flags and fixes for those warnings
-Fixed compiler escaping bug involving memset for char

Submitted by Samee Shahzada <onestsam@gmail.com> (maintainer) in PR 249904

Tested on Poudriere. 'portlint -AC' is fine.